The Excel spreadsheet for Upload products is different because it
passes information about the page size and number of pages in the
document uploaded by the customer.
The Excel Pricing settings allows you to download the default Excel templates and upload custom Excel templates to price products that are configured to use the Excel Pricing Engine or are linked to product profiles that use the Excel Pricing Engine.
It is also possible to turn on Excel pricing debugging which will save the last Excel file that was used to price each product. When enabled, the default debug file can be found in the back office, by editing the product in question and clicking Product Pricing Setup. On the Set Prices tab, you will find a link to Download Debug file.
The Excel spreadsheet for Upload products is different because it
passes information about the page size and number of pages in the
document uploaded by the customer.
Setting Up the Excel Pricing Engine File
Learn bout Excel Pricing for
Static and Dynamic products 
Learn about Excel Pricing
for Upload products